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- W2039734541 abstract "Summary Pathogenic oomycetes have evolved RXLR effectors to thwart plant defense mechanisms and invade host tissues. We analysed the function of one of these effectors (Penetration‐Specific Effector 1 ( PSE 1)) whose transcript is transiently accumulated during penetration of host roots by the oomycete P hytophthora parasitica . Expression of PSE 1 protein in tobacco ( Nicotiana tabacum and Nicotiana benthamiana ) leaves and in A rabidopsis thaliana plants was used to assess the role of this effector in plant physiology and in interactions with pathogens. A pharmacological approach and marker lines were used to charcterize the A . thaliana phenotypes. Expression of PSE 1 in A . thaliana led to developmental perturbations associated with low concentrations of auxin at the root apex. This modification of auxin content was associated with an altered distribution of the PIN 4 and PIN 7 auxin efflux carriers. The PSE 1 protein facilitated plant infection: it suppressed plant cell death activated by P seudomonas syringae avirulence gene AvrPto and P hytophthora cryptogea elicitin cryptogein in tobacco and exacerbated disease symptoms upon inoculation of transgenic A . thaliana plantlets with P . parasitica in an auxin‐dependant manner. We propose that P . parasitica secretes the PSE 1 protein during the penetration process to favour the infection by locally modulating the auxin content. These results support the hypothesis that effectors from plant pathogens may act on a limited set of targets, including hormones." @default.
- W2039734541 created "2016-06-24" @default.
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- W2039734541 date "2013-04-17" @default.
- W2039734541 modified "2023-10-18" @default.
- W2039734541 title "The<i><scp>P</scp>hytophthora parasitica</i><scp>RXLR</scp>effector Penetration‐Specific Effector 1 favours<i><scp>A</scp>rabidopsis thaliana</i>infection by interfering with auxin physiology" @default.
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- W2039734541 doi "https://doi.org/10.1111/nph.12270" @default.
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